A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 6650-01-113-7563
NSN 6135-00-613-1068
NSN 7035-01-309-6709
NSN 5996-00-137-9142
NSN 6645-01-436-9702
NSN 5950-00-097-1137
NSN 5975-00-801-5923
NSN 5985-00-420-8425
NSN 5925-01-485-3595
NSN 5960-01-233-2756
NSN 6650-01-170-1287
NSN 5895-01-529-5440